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3e0a4e85 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
669a5db4 JG |
2 | /* |
3 | * IDE tuning and bus mastering support for the CS5510/CS5520 | |
4 | * chipsets | |
5 | * | |
6 | * The CS5510/CS5520 are slightly unusual devices. Unlike the | |
7 | * typical IDE controllers they do bus mastering with the drive in | |
8 | * PIO mode and smarter silicon. | |
9 | * | |
10 | * The practical upshot of this is that we must always tune the | |
11 | * drive for the right PIO mode. We must also ignore all the blacklists | |
12 | * and the drive bus mastering DMA information. Also to confuse matters | |
13 | * further we can do DMA on PIO only drives. | |
14 | * | |
15 | * DMA on the 5510 also requires we disable_hlt() during DMA on early | |
16 | * revisions. | |
17 | * | |
18 | * *** This driver is strictly experimental *** | |
19 | * | |
20 | * (c) Copyright Red Hat Inc 2002 | |
21 | * | |
669a5db4 | 22 | * Documentation: |
25985edc | 23 | * Not publicly available. |
669a5db4 JG |
24 | */ |
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/pci.h> | |
669a5db4 JG |
28 | #include <linux/blkdev.h> |
29 | #include <linux/delay.h> | |
30 | #include <scsi/scsi_host.h> | |
31 | #include <linux/libata.h> | |
32 | ||
33 | #define DRV_NAME "pata_cs5520" | |
2a3103ce | 34 | #define DRV_VERSION "0.6.6" |
669a5db4 JG |
35 | |
36 | struct pio_clocks | |
37 | { | |
38 | int address; | |
39 | int assert; | |
40 | int recovery; | |
41 | }; | |
42 | ||
43 | static const struct pio_clocks cs5520_pio_clocks[]={ | |
44 | {3, 6, 11}, | |
45 | {2, 5, 6}, | |
46 | {1, 4, 3}, | |
47 | {1, 3, 2}, | |
48 | {1, 2, 1} | |
49 | }; | |
50 | ||
51 | /** | |
52 | * cs5520_set_timings - program PIO timings | |
53 | * @ap: ATA port | |
54 | * @adev: ATA device | |
55 | * | |
56 | * Program the PIO mode timings for the controller according to the pio | |
57 | * clocking table. | |
58 | */ | |
59 | ||
60 | static void cs5520_set_timings(struct ata_port *ap, struct ata_device *adev, int pio) | |
61 | { | |
62 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
63 | int slave = adev->devno; | |
64 | ||
65 | pio -= XFER_PIO_0; | |
66 | ||
67 | /* Channel command timing */ | |
68 | pci_write_config_byte(pdev, 0x62 + ap->port_no, | |
69 | (cs5520_pio_clocks[pio].recovery << 4) | | |
70 | (cs5520_pio_clocks[pio].assert)); | |
71 | /* FIXME: should these use address ? */ | |
72 | /* Read command timing */ | |
73 | pci_write_config_byte(pdev, 0x64 + 4*ap->port_no + slave, | |
74 | (cs5520_pio_clocks[pio].recovery << 4) | | |
75 | (cs5520_pio_clocks[pio].assert)); | |
76 | /* Write command timing */ | |
77 | pci_write_config_byte(pdev, 0x66 + 4*ap->port_no + slave, | |
78 | (cs5520_pio_clocks[pio].recovery << 4) | | |
79 | (cs5520_pio_clocks[pio].assert)); | |
80 | } | |
81 | ||
669a5db4 JG |
82 | /** |
83 | * cs5520_set_piomode - program PIO timings | |
84 | * @ap: ATA port | |
85 | * @adev: ATA device | |
86 | * | |
87 | * Program the PIO mode timings for the controller according to the pio | |
940a68de | 88 | * clocking table. |
669a5db4 JG |
89 | */ |
90 | ||
91 | static void cs5520_set_piomode(struct ata_port *ap, struct ata_device *adev) | |
92 | { | |
93 | cs5520_set_timings(ap, adev, adev->pio_mode); | |
94 | } | |
95 | ||
669a5db4 | 96 | static struct scsi_host_template cs5520_sht = { |
68d1d07b | 97 | ATA_BMDMA_SHT(DRV_NAME), |
d26fc955 | 98 | .sg_tablesize = LIBATA_DUMB_MAX_PRD, |
669a5db4 JG |
99 | }; |
100 | ||
101 | static struct ata_port_operations cs5520_port_ops = { | |
029cfd6b | 102 | .inherits = &ata_bmdma_port_ops, |
f47451c4 | 103 | .qc_prep = ata_bmdma_dumb_qc_prep, |
029cfd6b | 104 | .cable_detect = ata_cable_40wire, |
669a5db4 | 105 | .set_piomode = cs5520_set_piomode, |
669a5db4 JG |
106 | }; |
107 | ||
0ec24914 | 108 | static int cs5520_init_one(struct pci_dev *pdev, const struct pci_device_id *id) |
669a5db4 | 109 | { |
cbcdd875 TH |
110 | static const unsigned int cmd_port[] = { 0x1F0, 0x170 }; |
111 | static const unsigned int ctl_port[] = { 0x3F6, 0x376 }; | |
5d728824 TH |
112 | struct ata_port_info pi = { |
113 | .flags = ATA_FLAG_SLAVE_POSS, | |
14bdef98 | 114 | .pio_mask = ATA_PIO4, |
5d728824 TH |
115 | .port_ops = &cs5520_port_ops, |
116 | }; | |
117 | const struct ata_port_info *ppi[2]; | |
669a5db4 | 118 | u8 pcicfg; |
4ca4e439 | 119 | void __iomem *iomap[5]; |
5d728824 TH |
120 | struct ata_host *host; |
121 | struct ata_ioports *ioaddr; | |
122 | int i, rc; | |
669a5db4 | 123 | |
f08048e9 TH |
124 | rc = pcim_enable_device(pdev); |
125 | if (rc) | |
126 | return rc; | |
127 | ||
669a5db4 | 128 | /* IDE port enable bits */ |
5d728824 | 129 | pci_read_config_byte(pdev, 0x60, &pcicfg); |
669a5db4 JG |
130 | |
131 | /* Check if the ATA ports are enabled */ | |
132 | if ((pcicfg & 3) == 0) | |
133 | return -ENODEV; | |
134 | ||
5d728824 TH |
135 | ppi[0] = ppi[1] = &ata_dummy_port_info; |
136 | if (pcicfg & 1) | |
137 | ppi[0] = π | |
138 | if (pcicfg & 2) | |
139 | ppi[1] = π | |
140 | ||
669a5db4 | 141 | if ((pcicfg & 0x40) == 0) { |
a44fec1f | 142 | dev_warn(&pdev->dev, "DMA mode disabled. Enabling.\n"); |
5d728824 | 143 | pci_write_config_byte(pdev, 0x60, pcicfg | 0x40); |
669a5db4 JG |
144 | } |
145 | ||
5d728824 TH |
146 | pi.mwdma_mask = id->driver_data; |
147 | ||
148 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2); | |
149 | if (!host) | |
150 | return -ENOMEM; | |
151 | ||
669a5db4 | 152 | /* Perform set up for DMA */ |
09483916 | 153 | if (pci_enable_device_io(pdev)) { |
669a5db4 JG |
154 | printk(KERN_ERR DRV_NAME ": unable to configure BAR2.\n"); |
155 | return -ENODEV; | |
156 | } | |
5d728824 | 157 | |
b5e55556 | 158 | if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) { |
669a5db4 JG |
159 | printk(KERN_ERR DRV_NAME ": unable to configure DMA mask.\n"); |
160 | return -ENODEV; | |
161 | } | |
669a5db4 | 162 | |
5d728824 | 163 | /* Map IO ports and initialize host accordingly */ |
cbcdd875 TH |
164 | iomap[0] = devm_ioport_map(&pdev->dev, cmd_port[0], 8); |
165 | iomap[1] = devm_ioport_map(&pdev->dev, ctl_port[0], 1); | |
166 | iomap[2] = devm_ioport_map(&pdev->dev, cmd_port[1], 8); | |
167 | iomap[3] = devm_ioport_map(&pdev->dev, ctl_port[1], 1); | |
5d728824 | 168 | iomap[4] = pcim_iomap(pdev, 2, 0); |
0d5ff566 TH |
169 | |
170 | if (!iomap[0] || !iomap[1] || !iomap[2] || !iomap[3] || !iomap[4]) | |
171 | return -ENOMEM; | |
172 | ||
5d728824 TH |
173 | ioaddr = &host->ports[0]->ioaddr; |
174 | ioaddr->cmd_addr = iomap[0]; | |
175 | ioaddr->ctl_addr = iomap[1]; | |
176 | ioaddr->altstatus_addr = iomap[1]; | |
177 | ioaddr->bmdma_addr = iomap[4]; | |
9363c382 | 178 | ata_sff_std_ports(ioaddr); |
5d728824 | 179 | |
cbcdd875 TH |
180 | ata_port_desc(host->ports[0], |
181 | "cmd 0x%x ctl 0x%x", cmd_port[0], ctl_port[0]); | |
182 | ata_port_pbar_desc(host->ports[0], 4, 0, "bmdma"); | |
183 | ||
5d728824 TH |
184 | ioaddr = &host->ports[1]->ioaddr; |
185 | ioaddr->cmd_addr = iomap[2]; | |
186 | ioaddr->ctl_addr = iomap[3]; | |
187 | ioaddr->altstatus_addr = iomap[3]; | |
188 | ioaddr->bmdma_addr = iomap[4] + 8; | |
9363c382 | 189 | ata_sff_std_ports(ioaddr); |
5d728824 | 190 | |
cbcdd875 TH |
191 | ata_port_desc(host->ports[1], |
192 | "cmd 0x%x ctl 0x%x", cmd_port[1], ctl_port[1]); | |
193 | ata_port_pbar_desc(host->ports[1], 4, 8, "bmdma"); | |
194 | ||
5d728824 TH |
195 | /* activate the host */ |
196 | pci_set_master(pdev); | |
197 | rc = ata_host_start(host); | |
198 | if (rc) | |
199 | return rc; | |
200 | ||
201 | for (i = 0; i < 2; i++) { | |
202 | static const int irq[] = { 14, 15 }; | |
8c6b065b | 203 | struct ata_port *ap = host->ports[i]; |
5d728824 TH |
204 | |
205 | if (ata_port_is_dummy(ap)) | |
206 | continue; | |
207 | ||
208 | rc = devm_request_irq(&pdev->dev, irq[ap->port_no], | |
c3b28894 | 209 | ata_bmdma_interrupt, 0, DRV_NAME, host); |
5d728824 TH |
210 | if (rc) |
211 | return rc; | |
4031826b | 212 | |
cbcdd875 | 213 | ata_port_desc(ap, "irq %d", irq[i]); |
5d728824 TH |
214 | } |
215 | ||
216 | return ata_host_register(host, &cs5520_sht); | |
669a5db4 JG |
217 | } |
218 | ||
58eb8cd5 | 219 | #ifdef CONFIG_PM_SLEEP |
8501120f AC |
220 | /** |
221 | * cs5520_reinit_one - device resume | |
222 | * @pdev: PCI device | |
223 | * | |
224 | * Do any reconfiguration work needed by a resume from RAM. We need | |
225 | * to restore DMA mode support on BIOSen which disabled it | |
226 | */ | |
f20b16ff | 227 | |
8501120f AC |
228 | static int cs5520_reinit_one(struct pci_dev *pdev) |
229 | { | |
0a86e1c8 | 230 | struct ata_host *host = pci_get_drvdata(pdev); |
8501120f | 231 | u8 pcicfg; |
f08048e9 TH |
232 | int rc; |
233 | ||
234 | rc = ata_pci_device_do_resume(pdev); | |
235 | if (rc) | |
236 | return rc; | |
237 | ||
8501120f AC |
238 | pci_read_config_byte(pdev, 0x60, &pcicfg); |
239 | if ((pcicfg & 0x40) == 0) | |
240 | pci_write_config_byte(pdev, 0x60, pcicfg | 0x40); | |
f08048e9 TH |
241 | |
242 | ata_host_resume(host); | |
243 | return 0; | |
8501120f | 244 | } |
aa6de494 AC |
245 | |
246 | /** | |
247 | * cs5520_pci_device_suspend - device suspend | |
248 | * @pdev: PCI device | |
249 | * | |
250 | * We have to cut and waste bits from the standard method because | |
251 | * the 5520 is a bit odd and not just a pure ATA device. As a result | |
252 | * we must not disable it. The needed code is short and this avoids | |
253 | * chip specific mess in the core code. | |
254 | */ | |
255 | ||
256 | static int cs5520_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) | |
257 | { | |
0a86e1c8 | 258 | struct ata_host *host = pci_get_drvdata(pdev); |
aa6de494 AC |
259 | int rc = 0; |
260 | ||
261 | rc = ata_host_suspend(host, mesg); | |
262 | if (rc) | |
263 | return rc; | |
264 | ||
265 | pci_save_state(pdev); | |
266 | return 0; | |
267 | } | |
58eb8cd5 | 268 | #endif /* CONFIG_PM_SLEEP */ |
a84471fe | 269 | |
669a5db4 JG |
270 | /* For now keep DMA off. We can set it for all but A rev CS5510 once the |
271 | core ATA code can handle it */ | |
272 | ||
2d2744fc JG |
273 | static const struct pci_device_id pata_cs5520[] = { |
274 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5510), }, | |
275 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5520), }, | |
276 | ||
277 | { }, | |
669a5db4 JG |
278 | }; |
279 | ||
280 | static struct pci_driver cs5520_pci_driver = { | |
281 | .name = DRV_NAME, | |
282 | .id_table = pata_cs5520, | |
283 | .probe = cs5520_init_one, | |
2855568b | 284 | .remove = ata_pci_remove_one, |
58eb8cd5 | 285 | #ifdef CONFIG_PM_SLEEP |
aa6de494 | 286 | .suspend = cs5520_pci_device_suspend, |
8501120f | 287 | .resume = cs5520_reinit_one, |
438ac6d5 | 288 | #endif |
669a5db4 JG |
289 | }; |
290 | ||
2fc75da0 | 291 | module_pci_driver(cs5520_pci_driver); |
669a5db4 JG |
292 | |
293 | MODULE_AUTHOR("Alan Cox"); | |
294 | MODULE_DESCRIPTION("low-level driver for Cyrix CS5510/5520"); | |
295 | MODULE_LICENSE("GPL"); | |
296 | MODULE_DEVICE_TABLE(pci, pata_cs5520); | |
297 | MODULE_VERSION(DRV_VERSION); |